title: The aging ear: an otomicroscopic and tympanometric study.
mesh_terms: D000158:Acoustic Impedance Tests; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D001301:Audiometry, Pure-Tone; D002908:Chronic Disease; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009664:Norway / Q000453:epidemiology; D010033:Otitis Media / Q000175:diagnosis* / Q000453:epidemiology; D038781:Otoscopy; D012016:Reference Values; D012737:Sex Factors